Point me to an online source for baseball card prices. I found some cards that I've been sitting on from '86 and  '91.

The baseball card market is pretty sad for those years.  Do a search for Becketts.  I know they have a website but I'm not sure if they give out prices without a membership.

Never mind it's Beckett.com and they charge for price guide info.  You can always go to the supermarket and check out a Beckett's price guide or a copy of Tuff Stuff.

ebay

Cards now are not what they were in that time period. To get good money from your cards they must be graded. Grading is done by several companies but the main ones are PSA and the Beckett service. Myself I don't trust the grading services. I recently sent one of the big two a perfect Ken Griffey Upper Deck rookie card and it came back damaged and graded a 8. It has done no good to contact them. They don't return calls.